Yea I feel like there might be some other reason that they do it that wouldn't really apply to many others. Like with the number of people and animals it starts to become an issue? Or like someone at the top of this page said that it just removes all bacteria (beneficial and harmful both), but maybe they control their incubator to the point where only a small group has access or are allowed in there, so beneficial bacteria don't have a lot to protect against anyway.
Maybe you guys that have a good amount of experience breeding tell me something, about how often do eggs go bad, and how often do hatchlings have issues where they fail to thrive due to unknown reasons (ie not kinks, twisting, etc)?